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Cameron's Crane Class > Crane Test 6/29/2019 > Flashcards

Crane Test 6/29/2019 Flashcards

(113 cards)

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1
Q

What are the two types of Wire Rope?

A
  1. Rotation Resistant

2. Non Rotation Resistant

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2
Q

What is Rotation Resistant?

A

non-rotating rope or non-spin

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3
Q

What is the safety factor in Rotation Resistant?

A

5:1 (unless lifting personnel 10:1)

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4
Q

What is the safety factor in Non-Rotation Resistant?

A

3.5:1 (unless lifting personnel 7:1)

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5
Q

How many wires should be broken in the CORE before removal of a ROTATION RESISTANT cable?

A

1 broken wire in core

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6
Q

How many wires should be broken, and within how many diameters, before removal of a ROTATION RESISTANT cable?

A

2 broken wires in 6 diameters

4 broken wires in 30 diameters

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7
Q

How many wires should be broken in the CORE before removal of a NON-ROTATION RESISTANT cable?

A

1 broken wire in the core

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8
Q

How many wires should be broken in a strand of 1 lay before removal of a NON-ROTATION RESISTANT cable?

A

3 broken wires in 1 strand of 1 lay

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9
Q

How many RANDOMLY DISTRIBUTED wires should be broken in 1 lay before removal of a NON-ROTATION RESISTANT cable?

A

6 randomly distributed broken wires in 1 lay

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10
Q

How many wires should be broken at the END CONNECTION before removal of a STANDING ROPE cable?

A

2 broken wires at the end connection

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11
Q

How many wires should be broken AWAY FROM the END CONNECTION before removal of a STANDING ROPE cable?

A

3 or more away from the end connections

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12
Q

What is eccentric reeving?

A
  • hoist line not evenly distributed across sheaves

- creates side loading on boom or the block to hang uneven

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13
Q

What is excessive reeving?

A
  • too many parts of line for the lift

- adds additional weight and the possibility to run out of rope

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14
Q

What is sufficient reeving?

A

-enough parts of line to make the lift?

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15
Q

What are the 3 Parts of Line?

A
  1. Eccentric Reeving
  2. Excessive Reeving
  3. Sufficient Reeving
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16
Q

What are some signs of unstable footing?

A
  • uncompacted soil
  • voids
  • tanks
  • plumbing
  • loose backfill
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17
Q

When is unstable footing most common?

A

Most common around new construction

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18
Q

WHEN and WITH WHOM should you verify ground conditions?

A

Verify ground conditions WITH site supervisor AT new construction

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19
Q

What should be used to verify existing underground utilities and piping?

A

Verify with special number in phone book (LA One Call, Dottie), or local utilities for existing underground utilities and piping

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20
Q

What is the minimum swing clearance?

A

tail swing/superstructure radius plus 2’

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21
Q

What is the minimum excavation? Recommended?

A

1: 1 minimum

1. 5:1 recommended

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22
Q

What should you do if outriggers cannot be fully extended?

A

use next lower chart

  • -if 50% chart is available, use it
  • -if not, the on rubber chart may apply
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23
Q

What must blocking be able to support?

A

Blocking must be able to support the weight of the load and the crane

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24
Q

Where should the MOST ground bearing pressure be?

A

Most ground bearing pressure over corners

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25
Where should the LEAST ground bearing pressure be?
Least ground bearing pressure on crawlers- over side
26
Which surface (hard or soft) has more ground bearing pressure?
HARD SURFACES have more ground bearing pressure than soft surfaces
27
Where must outrigger floats be attached?
Outrigger floats must be attached to STABILIZERS
28
What is the most common cause of crane turnover?
Unstable Footing
29
Where is the luffing jib controlled?
controlled from the cab
30
How does the luffing job move?
moves independently of the boom
31
In spooling, how many wraps minimum are required on the drum when hoisted down? ****OSHA SAID THIS!!!****
2 wraps minimum remaining on drum when hoisted down
32
What percentage should a crane be de-rated by?
Crane must be de-rated by 50%
33
What is required over land?
Fall Protection
34
What is required over water?
Life Jacket
35
How often are inspections required?
Daily
36
What percentage should a proof test be?
125%
37
When can the proof test and trail lift be done?
Proof test and trail lift can be done at the same time (concurrently, simultaneously)
38
B30.23
Personnel Platforms
39
B30.5
Mobile and Locomotive Crane Standard
40
B30.9
Slings
41
1910.180
Cranes in General Industry (mostly overhead cranes)
42
1926.1400
Cranes in Construction
43
1926.1431
Suspended Personnel Baskets
44
1926.1402
Ground Condition
45
1926.1412
Inspections
46
1926.1413
Wire Rope Inspections
47
1926.251
Rigging
48
1926.1407-1926.1411
Power Lines
49
What are the TWO most common causes of fatalities involving cranes?
1. Use options or 20' for under 350kv | 2. Use options or 50' for over 350kv
50
If voltage is known: OPERATING | 10' = ? kv
0-50kv
51
If voltage is known: OPERATING | 15' = ? kV
over 50-200 kV
52
If voltage is known: OPERATING | 20' = ? kV
over 200-350 kV
53
If voltage is known: OPERATING | 25' = ? kV
over 350-500 kV
54
If voltage is known: OPERATING | 35' = ? kV
over 500-750 kV
55
If voltage is known: OPERATING | 45' = ? kV
over 750-1000 kV
56
What is the minimum clearance required for crane setup?
minimum 20' clearance
57
Transit: | 4' = ?
4' = 0.75
58
Transit: | 6' = ? kv
over 0.75-50kv
59
Transit: | 10' - ? kv
over 50-345kv
60
What is the most common cause of a crane turnover?
unstable footing
61
What is the most common cause of crane operator fatalities?
crane turnover
62
What is the most common cause of crane operator injuries?
getting in and out of the cab
63
What is the most common cause of fatalities involving cranes?
electrocution
64
What happens within 1%?
Crane must be leveled
65
What happens at 20%?
Duty cycle reduction
66
What happens at 50%?
Personnel Basket- Crane de-rating
67
What is based on 75%?
Load charts based on 75% on rubber and crawlers (when not on outriggers)
68
What happens at 75%?
Multiple crane lifts - Reduce capacities
69
What is based on 85%?
Load charts based on 85% on outriggers
70
What happens at 100%?
Cranes capacity on properly blocked outriggers
71
What happens at 110%?
Load test to be performed no greater than 110% of capacity
72
What happens at 125%?
Proof test of personnel baskets
73
What is gross capacity?
total capacity of the crane as listed in load chart
74
What are deductions?
lifting devices that must be deducted from the gross
75
When should jib NOT be deducted?
Do NOT deduct jib if it is being used
76
When should jib be deducted?
If erected and not used, it MUST be deducted
77
What should be done if a jib is stowed?
If it is stowed, a stowed deduction must be made
78
What is a jib deduction based on?
effective weight of jib- not actual
79
What is net capacity?
gross capacity minus deductions
80
What is gross load?
total of everything lifted by crane (load, ABH, excess cable, block, ball, jib, rigging, etc.)
81
What is net load?
load only (pump, valve, pipe, etc. equipment being lifted)
82
What is a range diagram used for?
used to scale work
83
What is an area chart used for?
defines crane quadrants - front, side, back, 360 degrees, etc.
84
What is a necessity for mobile cranes on barges?
Mobile cranes on barges MUST have a list chart from the manufacturer
85
What is backward stability?
crane may turn over backward
86
How should you measure radius?
measure from center of rotation to center of gravity of a freely suspended load
87
When is the ONLY time side loading is allowed?
side loading only allowed with freely suspended load
88
What cranes are least stable over the side?
mobile cranes
89
When may truck cranes no have lifting capacities over the front?
if there is not a 5th outrigger
90
What is pick and carry?
over front, short boom, low angle, and as close as possible
91
Where is pick and carry with a truck crane?
over the rear
92
Where are rough terrain cranes more stable?
over the front
93
Where are truck cranes more stable?
over the rear
94
What is the jib offset based on?
Jib offset based on job angle in relation to the boom
95
What is the boom angle based on?
Boom angle based on boom angle in relation to horizontal
96
What percentage is Hook Throat Wear?
10%
97
What degree is a Hook Twist?
10 degrees
98
What percentage is a Hook Mouth Opening/Throat Opening?
15%
99
The ______ the sling angle, the _______ the tension exerted by the same weight.
The LOWER the sling angle, the GREATER the tension exerted by the same weight.
100
What is the jib capacity based on?
Jib capacity is based on the structure of the jib
101
What increases stability of a crawler?
Blocking under track tips
102
What happens during boom deflection?
load swings out as boom bends with a heavy load
103
above the line = ?
structure
104
below the line = ?
stability/tipping
105
When does wind affect a cranes capacity the most?
when it is from the side
106
What is a possibility if a telescopic boom that is designed to extend equally gets out of sequence?
it is possible to damage the section that extends too far
107
On a lattice boom crane with adjustable mast or gantry positions, when is the crane generally stronger?
when the mast or gantry is higher
108
When using a friction crane with 'power down' capabilities, how should you lower a heavy load?
always use the power down function to lower heavy loads; DO NOT rely on brakes.
109
When a mobile crane is placed on a barge, how is the list of vessel compensated for?
it must be secured and a "list" chart provided by the manufacturer must be used
110
When are frequent inspections held and by whom are they performed by?
- daily to monthly | - performed by COMPATENT person
111
When are periodic inspections held and by whom are they performed by?
- monthly to yearly | - performed by QUALIFIED person
112
When can J-Hooks be used?
when lifting trusses
113
What must jibs have to prevent them from rolling back?
positive stops

Cameron's Crane Class (2 decks)

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